Switch



Jan. 22, 1929. 1,699,645

c. WILLIAMS ET Al..

SWITCH Filed Oct. 29, 1925 Cri Patented Jan. 22, 1929.

unirno simfrefsj CLARENCE WILLIIsnMs; OFDETROI'P, MICHIGAN-ANB ERNST G. APBIIETON, oF'QHIcnGo; ILLINoIsfasssIGNo-Rsro RoAeH'-AI=PnET0N MANUFAGTUEING coMIANY, 10F ont. v CAGO, ILLINOIS, A ooRPoRAIoNoFILLINoIs.-

' SWITCH.'

Th'e presenti invention "relates to switches.

The present"invention will be't describedL withpart'i'cular reference tota type of switch circuit of said automobile.'thouglastheidefj scription proceeds it will be noted that it has a widerscope. D

An object of the'present Invention 1s to 'pro-l dashboard ofl :in automobile and 'which' presents an unobstrusive appearance uponthe face o'saiddashboardf l A furtherobjeet is to providerlane'letttri'c switclt'o'f general p'plcirt-ion which its sturdy and reliable in 'peratin'and which is simple to manu'fature.'

Further objects Svill appear-as the description proceeds' Referring 'to the drawings- Fiofure 1 i's a view'n Aelevation of one em' bodim'ent-of the present invention;V

Figure 2 is a' longitudinal sectional View of the structure shown in Figure 1;

Figure 3 is aA sectional rView taken along the plane indicated by' the' arrows' 3 3 of Figure 2; and" Figure 4 is a. Viewl taken along' the-planes indicated by the'arrows 4-'4 of Figure 2.

The numeral 1 indicates a box-likecasing, or housing, which is closedon one side by' theinsulatingYA member 2. lTermimi-ls 3 and 4 are mounted in said insulating member 2 and are adapted to be'bridgd b v the resilient` contact member 5 disposed \i'ithin said casing 1. Secured tothe casing 1 in the'wall opposite to theinsulating member 2 is thev sind G. which is externally screw-threzuled throughoutat least a portion ot its length.- Suid stud houses a plunger 7, which is normally urged by the springl 8 in a direction outwardly of-the stud 6. Suid plunger 7 is provided with a head portion 9 for convenience of operation.

The screw-threaded lstud f6 is adapted to extend through the dashboard of an automobile (not shown). A nut (not shown) will be provided for holdingr the stud G and casing 1 in position. It will be noted that the stud 6 is so formed that a nut for cooperation with the screw-threaded portion may be inserted thereon over the outer end of said veniently iclamped upon the dashboardof`anql automobilejthe'casing 1 being disposednt the 'rear ofsaiddas'hboard. the stu'dG extending through' :at holeinsaid'dashbotrrdfand a nut' beingjused to clamp the'switchin'plac.

Thecasin'g '1 may donsist'of a metal stamping l1aving-n opten side which is provided withthe -closure member 2 of insulatingna terial. Said casing' 1"is provided with fingers" 104110 adapted to be bent over on the Qute'r'l side of the insulating member 2 to 'hol'dsaid insulating'member? in firm engagement With the adjaeente'dge o'the'eas'ingl. Said 'ini' "suletfin'g niember'Q is provided Witli pair of' Aspaced apertures for receiving 'the screws'l 11-"1'1',` Which 'screws may takethe fornif machln'e'screws, but" which screws'should :be

ot a material which' is a good' con'dl'i'clto'i'fof electricity. "Said 'sereuslllll are provided' screWs11``-11to hold said vscrews"irrnly in l position Witb'iu's'aid 'me'nber'2. 'Other nuts"' 15 -15 upon Said Screws 11-11 serve' as means' is slioiildered-close to its lowver'extrem'itw which shoulder forms an :tbutnfent for the'in "sulatii'ig` means 19. a wash-er 20 'being provided between said insulating member 19 and th shouldered"portion of thc-plunger 7 if preferred. 'The resilient"contaet''member't 5 provided *withl the' tivodiverging; er wiping portions 21-21l adapted t'o have a Wiping'contact With th'iiat-'top portions 'of the terminals-3 and 4. Said resilieht con- 5 tacti'nember 5 is provided at its centen 'with the aperture 22. which is of sufiicient size to prevent any possibility of contact between the plunger 7 und the contact member 5. Said Contact member 5 is secured in position on the insulating member 19 by means of the upturned portions 23, which are located within corresponding cut out portions 2A-24 in the sides of the insulating4 member 19. ..A`

25 is in turn held in place by means of the metallic Washer 26. The insulating member 19 and the resilient contact member 5 and their cooperating washers .above described are held in place at the lower extremity of theplunger 7 by afswedgedior riveted over :end portion 27.0 f-the plungerfl. Said insulating means, itwillbevobserved, serves the double Afunctionof '4 limiting gupward. movement of the plunger 7 and of forming an insulating abutment -for the contact member..

h The stud 6 is' provided nteriorly, intermediate of its lengtlnivitli. the shoulder 28 adapted to form an abutment for the lower extremityof the spring 8 as the parts are viewed in Figure 2, The plun er 7 is provided with the shoulder 30, whie i shoulder is preferably disposedliinivardlyof the stud G and which takes the'thru'st of the spring 8 at the uppei' end of said spring as the parts are viewed in vFigure` 2. Ifn "preferred, vthe plunger 7 'maylbe' provided with another shoulder 31 adapted Ito Contact with the npper extremity of-'thestud t3,4 as the parts are viewed in Figure 2, to limitjtlieinward movement of plungerf? and the lconsequent distortion of the resilient Contact member 5.

As will heap arent from the drawing and from Athe description ,appearing above, the spring 8V normally holds the plunger 7 in a position to hold the resilient contact member 5 out of enga-gin@ position. Vlien it is desired to move ,the Contact member 5 into bridging relationship with the terminals 3 and 4, the plunger 7 will be moved inwardly. The diverging legs 21- 21 of the contact member 5 will have a wiping action upon the tops of the terminals3 and 4, so that said terminals and said Contact member 5 will be selfcleaning. The insulating member 1S) Will be chosen of suliicient size that it will be prevented from turning in the casing 1 by reason of the sliding engagement of said insulating member 19 with the Valls ot said casing. By reason of the upstanding portions Q3 of the. Contact member 5, which upstandingr portions tit. within eorrespoiuling cut out portions in the insulating member l5), relative turning movement between the Contact member 5 and insulating member 19 is effectnally prevented.

The parts are sturdy, and simple to manufacture and assemble. 'l`lie switch is reliable and vpositive in its action.

Though a preferred embodiment of the present invention has been described in detail, many modifications will occur to those skilled in the art. It is intended to cover all such modifications that fall within the scope. of the appended claims.

Vliat is claimed isil 1. ln a switch, in con'ibination, a metallic housing, a pair of terminal members secured to but insulated from vsaid housing, a stud secured to said housing, a spring-pressed plunger within said stud, a guiding insulating member carried by said plunger and adapted to limit movement of said plunger in one direction relative to said housing, said insulating memberbeing shaped to conform to opposed side Walls oi' said housing whei'eb vto prei-'ent relative turning increment between said insulating member and said housing, a bridging contact member cooperatively asociated with said terminal members, said bridging Contact member having a pair of Contact adapted to contact with said ter- -minal members and a. pair of holding legs disposed' interinedi-ite o'j said contact legs, said holding legs being disposed within corresponding recesses in said insulating member out of contact with said housing, and means for holding said bridging Contact member against said guiding insulating member out of electrical Contact with said plunger,

:2. In a switch, in combination, a switch housing, a pair of terminal members secured to said housing but insulated therefrom, a plunger, a guiding insulating member disposed within said housing and having portions interlit-ting with the walls of said housing to prevent relative rotation between said guiding member and said housing, a bridging member cooperatively asmriated with said terminal members, said bridging meniber having a pair of legs adapted to contact with said terminal members and a pair oi holding legs disposed intermediate of said Contact legs, said holding legs being disposed in corresponding recesses in said gnidine insulating member, and means for holding said Contact member against said guiding insulating member ont. of elertrical Contact with said plunger.

Signed at Detroit., lirhigan, this 17th day (2i Obtubtl, i925.

Signed at Chicago, illinois, this 12th day o t October, 1925.

ERNST G. APPLETON.

llt) 

